Shore



0. L. WALLACE.

SHORE.

APPLICATION FILED NOV. 10. I920- Patented Dec. 13, 1921.

PATENT OFFICE,

OSCAR L. WALLACE, OF CINCINNATI, OHIO.

SHORE.

Specification of Letters Patent.

Patented Dec. 13, 1921.

Application filed November 10, 1920. Serial No. 423,142.

To all whom it may concern Be it known that I, OSCAR L. WALLACE, a

building construction and is particularly adaptable as an adjustable support for cement molds, although it may be used for any shoring operation, and for all purposes where an adjustable prop, stay or strut 1s required.

An object of the invention is to construct the shore so that when it has been set to: the required position there will be no posslbihty of the slipping of the parts, and consequent displacement of the forms supported thereby.

Another object of the invention is to provide an extensible shore consisting of two sections, one longitudinally, 'uidingly sustained within the other and formed with a wedge portion at which the sect1ons are clamped together and secured against relaxation or slipping under the weight of the shore sustaining load.

Another object. is to provide means for forcing the parts of the shore 1n their adjusted positions, the said means being attached to one section of the shore.

Other objects and certain advantages will appear in the description and special reference is made to the draw1ngs, form1ng a part of this specification, in wh1ch:

Figure 1 is a central vertical section showing my improved shore positioned for use in supporting a cement form.

Fig. 2 is a front elevation of Fig. 1.

Fig. 3 is a fragmentary detail perspective of the wedge portion of one of the shore sections.

Fig. 4 is a. horizontal section on line 4, 4:, Fig. 2. C

In carrying out my mvention, i provide a channel-iron '1 of suitable length, which functions as a base section of the shore, and as a support for jacking means, hereinafter described. Centrally of the web po-rtlon 2, of the channel-iron 1, I provide openings 3,

' designed to receive the clamping bolts 4.

A second section 5 slidably fits within the upper end of the channel-iron 1 and is provided with a lower slotted wedge portion 6, having the lower outer face or surface beveled 0r tapered as at 7, to] give a wedge formation, the small end of the wedge being at the lower end of the same. A lifting j aclr 8, representing a commercial type, is provided at its rear with a hook 9, designed to be placed within any one of the openings 3, to support the jack in its operative position. The head of the jack is placed in contact with the lower face of the adjustable section 5, to extend the same to the desired degree. The jack is removed after the sections or members are clamped or secured together. The bolts 4 traverse the slotted portion 6, of the Wedge portion of the section 5, and when the same has been extended, the clamping plates 10 are forced against the tapered portion 7, by nuts 11, to rigidly maintain the shore in its adjusted or extended position.

It will be seen that the beveled portion 7, acting as a wedge, entirely prevents displacement of the parts, the inclined surface or tapered portion receiving and supporting the thrust of the load against the clamping plates 10. When it is desired to remove the I shore, the nuts 11 are unscrewed and the bolts 4 removed,

The combination of the structure is simple, the action positive, and the invention has been found to be efiicient in every respect.

Having described my invention, I claim:

1. In a device of the class described, a channeled base member, openings in the web portion of the same, a head sect-ion of rectangular cross section slidably fitting within said base, having a downwardly tapered lower front face, a slot at a right angle to said tapered portion and of equal length thereto, clamping means traversing said base member and the slot of said head member and coacting with said tapered face.

2. In a device of the class described, a channeled base member, openings in the web portion of the same, a head section of rectangular cross section, slidably fitted within said base and having a beveled lower front face, a slot traversing said head section at a angle to said beveled face and of my name, as attested by the two subscribequa length thereto, bolts openings and said slot, clamping plates traversed by said bolts and coacting with 5 said beveled face, means for holding said plates against said beveled face.

In witness whereof, I hereunto subscribe traversmg said i ng witnesses. I OSCAR L; WALLACE.

Witnesses:

LOUISE A. BECK, JEANNETTE 0. Julius. 

